[Trailerpark Badass]

I’ve seen plenty of soccer games, and I clearly recall the refs stopping play several times to check on an apparently injured player.

[Obadiah]

The referee must adhere to the following procedure when dealing with injured players:

• play is allowed to continue until the ball is out of play if a player is, in the opinion of the referee, only slightly injured

• play is stopped if, in the opinion of the referee, a player is seriously injured

-FIFA Laws of the Game

So a player cannot merely feign an injury to rest or to stop the momentum (advantage) of the opposing team.